Sorry im lame! Testing variable between two values??

[intrigue]

Ok its been a while since i did PHP
So i want to check if a value is between 20 and 40

so i have done

If ( $score<=19)
		{
	   	echo "Picture 1<br>";
	   	} 
	elseif ($score=>20 and $score <=39)
		{
		echo "Picture 2<br>";
		}
	else
		{
		echo "oops<br>";
		}

I get an error Parse error: parse error, unexpected T_DOUBLE_ARROW in Untitled-1.php on line 16

Can anyone help?
.matt